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Formaldehyde gas sensitive material based on tin sludge recovery treatment, and preparation method thereof

A technology of formaldehyde gas and tin sludge, which is applied in the analysis of materials, material resistance, and material analysis through electromagnetic means, to achieve the effects of resource saving, production cost reduction, high sensitivity and response recovery rate

Active Publication Date: 2020-04-17
深圳爱多科传感技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, SnO prepared by hydrothermal method, sol-gel method, chemical precipitation method, etc. 2 Gas-based gas sensors have been widely studied, but there are few reports on the recovery of industrial waste tin sludge and its application to gas-sensing materials.

Method used

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  • Formaldehyde gas sensitive material based on tin sludge recovery treatment, and preparation method thereof
  • Formaldehyde gas sensitive material based on tin sludge recovery treatment, and preparation method thereof
  • Formaldehyde gas sensitive material based on tin sludge recovery treatment, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Take 5g of recovered tin mud and dissolve it in 30ml of deionized water, stir vigorously at 2000rpm for 30min, and then separate the solid and liquid through suction filtration. To achieve solid-liquid separation, dissolve the obtained filter residue in 50ml deionized water, add 3.5ml0.5mol / L Ba(OH) to it under magnetic stirring 2The prepared solution and 10ml of 0.5mol / L dilute sulfuric acid solution were magnetically stirred at room temperature for 1 hour, and then the obtained solution was centrifuged to achieve solid-liquid separation. After heat preservation at 60°C in a drying oven for 12 hours, grind the dried solid into a uniform powder and place it in a muffle furnace at a heating rate of 5°C / min at 500°C for 2 hours. After the reaction is completed, cool it down to room temperature in the furnace Get BaSO 4 Doped Recycled Slime. Weigh 3g BaSO 4 The reclaimed tin sludge of doping is placed in the agate ball mill tank, and Fe is added thereto according to the...

Embodiment 2

[0046] Take 5g of recovered tin mud and dissolve it in 30ml of deionized water, stir vigorously at 2000rpm for 30min, and then separate the solid and liquid through suction filtration. Realize solid-liquid separation, the obtained filter residue is dissolved in 50ml deionized water, and 5ml0.5mol / L Ba(OH) is added thereto under magnetic stirring 2 The prepared solution and 7.5ml 0.5mol / L dilute sulfuric acid solution were magnetically stirred at room temperature for 1 hour, and then the obtained solution was centrifuged to achieve solid-liquid separation. Place it in a drying oven at 60°C for 12 hours, grind the dried solid into a uniform powder and place it in a muffle furnace at 400°C for 2 hours at a heating rate of 5°C / min. After the reaction is completed, cool it down to room temperature in the furnace After getting BaSO 4 Doped Recycled Slime. Weigh 3g BaSO 4 The doped reclaimed tin sludge is placed in an agate ball mill jar, and Fe is added thereto at a mass ratio of...

Embodiment 3

[0049] Take 5g of recovered tin mud and dissolve it in 30ml of deionized water, stir vigorously at 2000rpm for 30min, and then separate the solid and liquid through suction filtration. Realize solid-liquid separation, the obtained filter residue is dissolved in 50ml deionized water, and 4.5ml0.5mol / L Ba(OH) is added thereto under magnetic stirring 2 The prepared solution and 20ml of 0.5mol / L dilute sulfuric acid solution were magnetically stirred at room temperature for 1 hour, and then the obtained solution was centrifuged to achieve solid-liquid separation. After heat preservation at 60°C in a drying oven for 12 hours, grind the dried solid into a uniform powder and place it in a muffle furnace at a heating rate of 5°C / min at 600°C for 2 hours. After the reaction is completed, cool it down to room temperature in the furnace Get BaSO 4 Doped Recycled Slime. Weigh 3g BaSO 4 The reclaimed tin sludge of doping is placed in the agate ball mill tank, and Fe is added thereto acc...

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Abstract

The invention discloses a preparation method of a Ba-doped and Fe modified formaldehyde gas-sensitive material based on tin sludge recovery treatment, and belongs to the field of tin secondary resource-tin mud recycling, resource saving, environmental friendliness and gas sensors. According to the invention, a by-product tin mud deposited at the bottom of an anode tank in electrotinning productionis subjected to BaSO4 doping through an aqueous solution route and is subjected to Fe2O3 modification through a high-energy ball milling method so as to prepare the formaldehyde gas-sensitive material; the prepared gas-sensitive sensing element has excellent gas-sensitive properties such as high sensitivity to formaldehyde, high response recovery rate and the like; and the product is creatively applied to the field of gas sensing while tin resources is saved, the production cost of enterprises is reduced and the consciousness of environmental protection is implemented, and a resource-friendlyand environment-friendly research method is provided.

Description

technical field [0001] The invention belongs to the fields of secondary tin resource—recycling of tin mud, resource conservation, environmental friendliness, and gas sensor, in particular a method for recycling tin mud and applying it to formaldehyde gas-sensitive materials. Background technique [0002] With the continuous development and expansion of the world's population and economic development level, the consumption rate of tin resources is huge and may be exhausted within a few decades. The production of tin mines alone cannot meet the global demand for tin. Therefore, it is of great significance to recover and reuse tin from tin secondary resources by simple and economical methods. Tin anode slime is an important secondary resource containing tin, which is a by-product in the production process of electroplating tin. Enterprises produce hundreds of tons of tin anode slime every year. Obviously, if the tin sludge is discharged as industrial waste, it will not only ca...

Claims

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Application Information

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IPC IPC(8): C01G19/02G01N27/12
CPCC01G19/02G01N27/125C01P2004/80Y02P10/20
Inventor 尹远洪梅小敏
Owner 深圳爱多科传感技术有限公司
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